ISS033-E-017974 (1 Nov. 2012) --- Expedition 33 Commander Sunita Williams, NASA astronaut, participates in a 6-hour, 38-minute spacewalk outside the International Space Station on Nov. 1, 2012. During the spacewalk, Williams and Akihiko Hoshide, who represents the Japan Aerospace Exploration Agency (JAXA), ventured outside the orbital outpost to perform work and to support ground-based troubleshooting of an ammonia leak.